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A motorboat can travel 15 miles down the river in the same amount of time it takes to travel 9 miles up the river. Step 2: Create a chart and fill in the chart with as much information as you can.In this case, the speed of the boat down the river is x 2 because the river is making the boat go faster.In some cases you will not need to bottom row, but I always make the same chart to begin each problem even if I don’t need to bottom row.
This introductory mathematics course is for you if you have a solid foundation in arithmetic (that is, you know how to perform operations with real numbers, including negative numbers, fractions, and decimals).
Numbers and basic arithmetic are used often in everyday life in both simple situations, like estimating how much change you will get when making a purchase in a store, as well as in more complicated ones, like figuring out how much time it would take to pay off a loan under interest.
Create a Distance, Rate, and Time chart similar to the one shown below.
I always create a 3 by 3 chart and label the left side based on the problem at hand, the last row is always labeled “Total”.
The subject of algebra focuses on generalizing these procedures.
For example, algebra will enable you to describe how to calculate change without specifying how much money is to be spent on a purchase-it will teach you the basic formulas and steps you need to take no matter what the specific details of the situation are.
Using the same formula as question #1, the equation is: Average speed= 2700 mi/ 3 days= 900 mi/day. Pflaumer was eager to know who would win in a race of acceleration, so he decided to calculate.
However, the question is asking for the average speed in hours. He knows that he can run from 0 m/s to 4 m/s in 2 seconds.
Units 6, 7, and 8 may seem more abstract than the earlier ones, as you will deal with expressions that contain mostly variables and not too many numbers.
While the procedures you will master in these units might seem to have little practical application, you have to keep in mind that they result in formulas that describe very real situations in business, accounting, and science.